GlobalFoundries and Marvell Technology have expanded their agreement to increase production capacity for a type of semiconductor used in high-speed optical connections in data centers. Shares of GlobalFoundries rose nearly 6% in premarket trading on Thursday, while Marvell was up 4.5%. Here are some details: • The multi-year agreement will increase capacity for GlobalFoundries' silicon germanium (SiGe) technology, which enables faster and more energy-efficient semiconductor devices, at its facility in Burlington, Vermont.